Germs can hang out in bathrooms for a long time

Each trip to the restroom is its own unique journey into germ land. So some occasions probably require more washing up than others.

"If you've got diarrhoea all over your hands, it's way more important that you wash your hands than if... you didn't get any obvious poop on your fingers," Schaffner said. "My gosh, if you've got poop on your hands and you have the time, certainly, get in there, lather up real good and do a real good job."

"People who use urinals probably think they don't need to wash their hands," Michael Osterholm, director of the University of Minnesota's Center for Infectious Disease Research and Policy, said to the New York Times. (In studies, women tend to be better about adhering to hand washing than men.)

But it's best to wash your hands after every trip to the toilet because human faeces carry pathogens like E. coli, Shigella, Streptococcus, hepatitis A and E, and more.

Even if your own hands are clean and poo-free, can you say the same for the last person who touched that toilet handle, used the sink, or opened the bathroom door?

Hand washing is a life-saving routine

Religious traditions have urged cleanliness via ritual hand washing for thousands of years. But it wasn't until the 1800s that health care professionals linked good hand hygiene to lower infection rates.

Dr. Ignaz Semmelweis noticed that when doctors and medical students handled cadavers before touching patients in the maternity ward, more mothers developed fevers and even died. He instituted an unpopular chlorine-washing rule and saw the death rates tumble.

Similarly, during the Crimean War, nurse Florence Nightingale initiated hand-washing rules and other hygiene measures in the British hospital where she worked. Death rates there dropped by two-thirds, providing some of the first hard evidence that proper hygiene saves lives.

We're still far from perfect at preventing infections. People generally contract diarrhoea - which kills around 525,000 children under five annually around the world - by drinking dirty water, eating contaminated food (often soiled by dirty hands), and from person to person contact "as a result of poor hygiene," according to the World Health Organisation.

"I think a good general rule of thumb is you should wash your hands any time you feel that they might be dirty," Schaffner said. In other words, seize the opportunity when you're near a sink.

He said he's not "super paranoid" about making sure his own hands are always squeaky clean, but some of his favourite times of day to wash up are after walking the dog, working in the dirt, or handling raw meat.

Even a quick "splash 'n dash," as researchers like to call the practice of rinsing with water but no soap, can help fight off some bacteria that causes infections. But that shortcut is not advised if you might have raw meat or faeces on your mitts, and a lather with soap and water is more effective at disinfecting hands than any wipe or sanitizer.

Here are Schaffner's best tips for your next journey to the toilet

First, don't worry about the temperature of the water; Schaffner's studies have confirmed that doesn't make a difference. He suggests that you "adjust the water temperature so it's a nice comfortable temperature, so you can do a good job."

Second, give yourself enough time to "get some soap in there, lather it up real good, clean under your finger nails," Schaffner said. Spending even five seconds washing your hands can help reduce the amount of bacteria on them, but 20 seconds is better. The Centres for Disease Control recommends humming the Happy Birthday song to yourself twice as a timer.

Third, dry off before you leave the room. This step is key because wet hands transfer more bacteria than dry ones.

"If your hands are still wet, you go to touch that door of the bathroom, having your wet hand might actually help transfer bacteria," Schaffner said. He'll even dry his palms on his pants if there's no paper towel around.

Despite all the evidence demonstrating the health benefits of regular hand washing, Schaffner knows his advice can only go so far.

"I'm not in charge of you washing your hands, just because I'm a guy who did some science and did some research on hand-washing," he said. "You do what you want."

Comments

Even if your own hands are clean and poo-free, can you say the same for the last person who touched that toilet handle, used the sink, or opened the bathroom door?

This is why public toilets should actually not have an outside door. You use the toilet, wash your hands then open another door to get out... and undo the good work you've done washing your hands because some jerk didn't wash theirs and smeared god knows what on the door handle.

Or at the very least, if its going to have a door, make it open out not in. Never understood why it seems every public toilet door opens in... doesnt matter if you touch it entering, i just dont want to touch it as im leaving.

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